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Finding the Fourth Proportional to 20,747.76, 28,632.72 and 11,316.72

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Solution

The fourth proportional to 20,747.76, 28,632.72 and 11,316.72 is: 15,617.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.76 : 28,632.72 = 11,316.72 : x
  2. Step 2: Convert to fraction form
    20,747.76/28,632.72 = 11,316.72/x
  3. Step 3: Cross multiply
    20,747.76x = 28,632.72 × 11,316.72
  4. Step 4: Simplify right side
    20,747.76x = 324,028,475.08
  5. Step 5: Solve for x
    x = 324,028,475.08/20,747.76
  6. Step 6: Final answer
    x = 15,617.52

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